Don Coppersmith, Michel Petitjean
Comptes Rendus Mathematique
A new algorithm for computing Hadamard transforms is presented. If n is a power of four, then the new algorithm uses ⅞ n logn multiply/adds to compute a Hadamard transform of length n. © 1994 IEEE
Don Coppersmith, Michel Petitjean
Comptes Rendus Mathematique
Don Coppersmith
Journal of Cryptology
Ephraim Feig
Magnetic Resonance in Medicine
Don Coppersmith
Proceedings of the American Mathematical Society